玻璃纤维筋在盾构端头井围护结构中的应用  

Application of Fiberglass Reinforcement in Exterior-protected Structure of Shield End Shaft

作　　者：林刚[1] 罗世培[1] 

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《铁道工程学报》2009年第8期77-81,共5页Journal of Railway Engineering Society

基　　金：建设部项目资助(建标函2008[102号])

摘　　要：研究目的:采用玻璃纤维筋代替盾构端头井围护结构中的钢筋不但可以减少盾构进出洞事故,提高施工效率,还可以减少端头井地层加固费用。基于以上原因,本文通过理论分析、室内及现场试验等手段对盾构端头井围护结构采用玻璃纤维筋进行研究,为施工和推广应用提供参考。研究结论:通过室内试验得出了玻璃纤维筋的基本力学参数和玻璃纤维筋混凝土的基本构造特性;参照钢筋混凝土设计方法和正截面承载力假设,推导出玻璃纤维筋混凝土的基本设计公式;通过现场试验得到了玻璃纤维筋围护桩在基坑施工全过程中的第一手实测资料;为玻璃纤维筋在盾构端头井围护结构中的应用提供了理论、技术和现场实施等方面的依据。Research purposes： The application of fiberglass reinforcement in exterior - protected structure of shield end shaft instead of steel reinforcement not only can reduce the occurrence of accident that the shield enters into and comes out from the shield end shaft and improve the efficiency of construction, but also reduce the cost for consolidation of stratum at the end shaft. For the reasons mentioned above, in this paper the study is done on the application of fiberglass reinforcement in the exterior - protected structure of shield end shaft through the theoretical analysis, indoor test and in situ test.Research conclusions：The basic mechanical parameters of fiberglass reinforcement and the basic structure features of fiberglass reinforced concrete are obtained through the indoor test. The basic design formula of fiberglass reinforced concrete has been deduced with referring to the design method for reinforced concrete and assumption of the bearing capacity of cross - section. The measured data of the first hand about application of fiberglass reinforcement exterior - protected pile in the construction of foundation pit are gained through the in situ test. All of these provide the theoretical, technical and in situ basis for application of fiberglass reinforcement in exterior - protected structure of shield end shaft.

关 键 词：玻璃纤维筋 盾构 端头井 围护结构 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]